Measuring instrument.



PATENTED NOV. 26, 1907. J. JACOBSON 6a J. HAUGLAND.

MEASURING INSTRUMENT.

APPLICATION FILED MAY 21. 1907.

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` UNITED STATES PATENT oEEioE.

JACOB JCOBSON AND `TOHN HAUGLAND, OF BROOKLYN, NEW YORK.

'MEASURI'NG INSTRUMENT.

Specication of Letters Patent.

Patented Nov. 26, 190.7. i

Application filed May 21. 1907l Serial No. 374.884.

To, all 'whom 'it .may concern.'

Be it known that we,` JACOB JAconsoN,`

- large or small.l

further object of the invention is to con struct a rule of this character in separate sections which may be readily juxtaposed end to end and secured together in extended form, and as readily separated and super-` posed A'or laid side by side and thus secured together, occupying relatively little space when` not in use..A

Other| objects and advantages of the invention will become apparent from the'followingspecification and annexed drawings in which one embodiment ofthe invention` is illustrated.`

In the accompanying drawing wherein like reference characters refer to-tlike parts throughout the several viewst-Fio'ure 1is aside view of the rule when extended; Fig. 2 is an edge view of the same; Fig. 3 is an edge View of the rule illust atin the several sections as lying superposed an secured to-` gether; Fig. 4 is a Vertical sectional view taken through the narrow pa'rt of the rule showing a 'mortise and tenon joint formed between the ends of rule sections; Fig. 5' is a view s'imilar to Fia. 4 taken through the wide part of the ru e; Fig. 6 is a vertical sectional View through three rule sections, and illustrates the manner of securing the same together; Fig. 7 is a vertical sectional view through the level; and 8 is a similar *view through the plumb.

The instrumentcomprises 'a plurality of sections, three being illustrated in the drawing numbered respectively, 1, 2 and 3. The intermediate section 2 is provided with a mortise 4'at eachend into which a tenon 5 formed on one end of each end section 1 andl 3 is desi ned to enter. The tenons are firmly he d in the mortise by means of screws 6 which passes' through threaded apertures 'in the walls of the mortise' and into bores formed at the side of each tenon. The lower end 7 of eachscrew 6 is preferably smooth, ife. without a thread, to enable it to snugly fit in the bore in the tenon. The heads of the screws 6 are also preferably counter sunk, as shown in Fig. 5-'so as to present no obstruction to the passage of a pencil or tool over the edge'of the rule.

The best method of 'forming the mortise and tenon joint above described is-that illustrated in the drawing, wherein the mortise is cut out of a metal plate or Iblock 8, secured by screws 9 to one of the rule secs. tions and the tenon is formed from a similar metal late or block 10 held by screwsll to the ru e sections.v

In one of the rule sections, preferably the centralsection 2 we provide a level designated generally as 12, which is countersunk below the edge of the rule, as shown in Fig. l

7.. The Ipreferred form of the level comrises a g ass tubing 13 artially filled with iquid and designedto in icate by the bubble 14 whether or not the object measured by the instrument is perfectly level.. The level is su ported upon a lplate 15 held by screws 16 w 'ch bear in brackets l17 and are held' in place by screws 18 which pass `through the brackets as .well as throu h the covering plate 18 in which is provi ed an orifice 19 through which the level may be seen. lThe level is partially inclosed by a casingbl.

Each of -the screws 16 is surrounded coiled spring 20 which aids inadjusting the .distance of the level 12 from the late 18.

Fig. 8 is illustrative-of a plum which we place in one of thevsections of the rule also preferably the central section 2. The plumb is placed transversely in the section 2 and closely resembles the level above described.

like it, com rising a glass tubing 21 partially filled with iquid 22 and adapted to indicate by a bubble 23 whether or not the `object measured is straight.

It will be understood that thelevel is provided for the pur oses of measuring horizontals and the. umb to measure perpendiculars. The tu ing 21 is partially-incased in a boxin 24 which is supported vby a late 25 ad'usta le u on thq screws 26 whic encirc ed by co1 ed springs 27. The screws 26 ass throu h plates 28 and 29 which are hel to the e ge of the rim section by screws 30. A semicircular orifice 31 is formed n are the rule section 2 to permit the operation of the plumb to be observed.

Referring to Fig. 6, the means employed.

for securing the several sections in superlposed relatlon will now be described. In

each of the upper and lower sides of one of the rule sections, preferably the intermediate v section 2 we secure a plate 33 by screws 34,

the section being bored at V35. .Each plate 33 is rovided with an extension 36 and is centra ly bored and screw threaded. Each of the rule sections 1' and 3 has a central vbore 37 in which is placed a screw 38 havin the lower end of the shank threaded an the upper part thereof smooth. The threaded en s of the screws are designed to pass through plates 39 of uniform thickness, fastened at one side of the rule section by screws 40 over the bore holes. At the other side of each rule section is a' second apertured plate 41' which acts to prevent the heads of the screws 38 from projecting over Vthe edge of the rule section, each screw 38 -apparent that vwe have produced a simple and compact instrument, which may be cheaply manufactured, and is designed to avoid the necessity of separate instruments for different lengths to be measured. Y

Itwill of course. be understood that we may employ more or less than three rule sections, and that'three have been shown in the drawing merely for the purpose of clearly illustrating our invention.

Having thus described our invention, what we 'claim as new and'desire to secure byLetters Patent is 1. In' a measurin instrument of the class described, the com ination with a series of independent rule sections, of a plumb and level mounted inone of said sections, means for securing sald sectlons end to end, and means to securesaid sections 1n superposed 2. In a-measuring instrument of the class described,` the combination with a series of rule sections, of means for securing said sec tions in superposed relation,l said means comprising a bore passing entirely through one said section and an -apertured screw threaded plate at each'end of, and concentric with, said bore, and screws countersunk in the other said sections'and being adapted to engage the screw threaded plates.

3. In a measuri instrument of the class described, the com ination with a vseries of rule sections, of means for securing said sections in superposed relation, said means comprising va bore passing entirely through one said section and an apertured screw threaded plate at each end of, land concentric with said bore, and screws countersunk in the other said sections and being adapted to engage the screw threaded plates, each of said screws having the upper part of its shank smooth and the lower part thereof screw threaded.

4. In a measuring instrument of the class described, the combination with a. series of rule sections, of .means for securing said sections in superposed relation, said means comprising a bore passing entirely through one said section and an apertured screw threaded plate at each end of, andi concentric with, said bore, and screws countersunk in the .othersaid sections and being adapted to engage/the's'crew threaded plates, each .of said screws having the yupper part of its shank smooth and the lower part thereof screw threaded, and a coiled spring surrounding each screw and being designed to prevent the same from projecting beyond the surface of its rule section when the said screw isnot in engagement with the screw threaded plate.

In testimony whereof we have hereunto aflixed ourosignatures in presence of two witnesses.r Y

JACOB JACOBSON. JOHN HAUGLAND.

Witnesses: y

y ED. J. FANDREY, OSCAR BREVARD. 

